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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001 *
* by the XIPHOPHORUS Company http://www.xiph.org/ *
* *
********************************************************************
function: random psychoacoustics (not including preecho)
last mod: $Id: psy.h,v 1.27.2.1 2001/12/27 08:09:33 xiphmont Exp $
********************************************************************/
#ifndef _V_PSY_H_
#define _V_PSY_H_
#include "smallft.h"
#include "backends.h"
#ifndef EHMER_MAX
#define EHMER_MAX 56
#endif
/* psychoacoustic setup ********************************************/
#define MAX_BARK 27
#define P_BANDS 17
#define P_LEVELS 11
typedef struct vp_couple{
int limit; /* sample post */
int outofphase_redundant_flip_p;
float outofphase_requant_limit;
float amppost_point;
} vp_couple;
typedef struct vp_couple_pass{
float granulem;
float igranulem;
vp_couple couple_pass[8];
} vp_couple_pass;
typedef struct vp_attenblock{
float block[P_BANDS][P_LEVELS];
} vp_attenblock;
#define NOISE_COMPAND_LEVELS 40
typedef struct vorbis_info_psy{
float ath[27];
float ath_adjatt;
float ath_maxatt;
float tone_masteratt;
float tone_guard;
float tone_abs_limit;
vp_attenblock toneatt;
int peakattp;
int curvelimitp;
vp_attenblock peakatt;
int noisemaskp;
float noisemaxsupp;
float noisewindowlo;
float noisewindowhi;
int noisewindowlomin;
int noisewindowhimin;
int noisewindowfixed;
float noiseoff[P_BANDS];
float noisecompand[NOISE_COMPAND_LEVELS];
float max_curve_dB;
vp_couple_pass couple_pass[8];
} vorbis_info_psy;
typedef struct{
int eighth_octave_lines;
/* for block long/short tuning; encode only */
float preecho_thresh[4];
float postecho_thresh[4];
float preecho_minenergy;
float ampmax_att_per_sec;
/* delay caching... how many samples to keep around prior to our
current block to aid in analysis? */
int delaycache;
} vorbis_info_psy_global;
typedef struct {
float ampmax;
int channels;
vorbis_info_psy_global *gi;
} vorbis_look_psy_global;
typedef struct {
int n;
struct vorbis_info_psy *vi;
float ***tonecurves;
float *noisethresh;
float *noiseoffset;
float *ath;
long *octave; /* in n.ocshift format */
long *bark;
long firstoc;
long shiftoc;
int eighth_octave_lines; /* power of two, please */
int total_octave_lines;
long rate; /* cache it */
} vorbis_look_psy;
extern void _vp_psy_init(vorbis_look_psy *p,vorbis_info_psy *vi,
vorbis_info_psy_global *gi,int n,long rate);
extern void _vp_psy_clear(vorbis_look_psy *p);
extern void *_vi_psy_dup(void *source);
extern void _vi_psy_free(vorbis_info_psy *i);
extern vorbis_info_psy *_vi_psy_copy(vorbis_info_psy *i);
extern void _vp_remove_floor(vorbis_look_psy *p,
float *mdct,
float *codedflr,
float *residue);
extern void _vp_compute_mask(vorbis_look_psy *p,
float *fft,
float *mdct,
float *mask,
float global_specmax,
float local_specmax,
float bitrate_noise_offset);
extern void _vp_quantize_couple(vorbis_look_psy *p,
vorbis_info_mapping0 *vi,
float **pcm,
float **sofar,
float **quantized,
int *nonzero,
int passno);
extern float _vp_ampmax_decay(float amp,vorbis_dsp_state *vd);
extern void psy_normalize_noise(vorbis_block *vb,float *pcm,int n);
#endif
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